Midway has updated the official Mortal Kombat: Deadly Alliance site with screenshots for the game. Also, the site features more information on the levels and a new character.

The Acid bath
This level resembles the Acid Pool level in Mortal Kombat II, and the character Shang Tsung resides here. The level is called the acid bath for a reason, the battleground is surrounded by acid. I wouldn't like to fall in that.
Level screenshot

The Kuatan Palace
This arena is Goro's throne room, and it is surrounded by Pilars of Anciet Heroes. This room might confirm that Goro is a character in this game, though Midway ahsn't said anything officialy about that yet.
Level screenshot

The Lava Shrine
The Lava Shrine is completely surrounded by, duh, lava. It has a big dragon's egg in the middle of the game, which probably belongs to a new character, the Dragon King.

Level screenshot

Man these levels look excellent. Can't wait to get my hands on this one.
Mortal Kombat: Deadly Alliance will come out on all systems, GameCube, GBA, PS2, Xbox and PC. The release is scheduled this fall.

Source: Gamespot